Product
Vivitar 28-85mm f/2.8-3.8 Auto Variable Focusing is a manual focus prime zoom lens for full frame cameras.
Optical design
Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle.
Physical characteristics
Weights 650 grams so it is a heavy lens, consider using its own lens bag. With a lens filter diameter of 67 mm commonly filter size, offers a wide range of filter options. 105 mm long, requires consideration if you want to carry in the camera bag.
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